Out of curiosity, what channels were you getting with the replacement receiver, just the free preview channels?
If anyone else does find themselves in a similar situation, I would be willing to do a trade with them. I have some deactivated purchased ViP211k's with the G4 card already installed. Besides the G4 card being required for Flex Pack, the difference between the white G4 card and the older (purple or built-in) G3 card is that receivers with the G3 card that have been activated on an account will continue to work for free preview channels, even after the receiver is deactivated. Receivers with the G4 card will not continue to work for free preview channels after they are deactivated. This makes the G3 card receivers more useful for my purposes, until Dish eventually stops supporting that card model entirely.